Ryan Zimmerman is carried off the field following Sunday's heroics. (Haraz N. Ghanbari/AP)

By Bill Ladson / MLB.com

Ryan Zimmerman took it upon himself to ensure the Nationals would not lose the rubber game of their three-game series against the Yankees on Sunday. The rookie third baseman launched a walk-off two-run homer off New York starter Chien-Ming Wang in the bottom of the ninth for a dramatic victory.